Authorities on Thursday asked for the public's help in finding a 91-year-old wife and 87-year-old husband who went missing from Palmdale days earlier.

Keith and Pauline Davis were last seen about 6 p.m. Tuesday at their home in the 38000 block of Sage Tree Street, according to the Los Angeles County Sheriff's Department, which released photos of the couple and their car.

Pauline Davis suffers from hearing and vision loss, investigators said in a statement. She is described as 5 feet, 4 inches tall, weighing 140 pounds, with brown eyes and short white hair.

Keith Davis has been diagnosed with dementia. He is said to be 6 feet tall, weighs 185 pounds, with blue eyes, short white hair and a beard